sometimes you just gotta go with what you can find... on the first version main power board, the original style SDS201/SDS202 transistors at Q1/Q3 are no longer available in any flavor or form from anybody anywhere. These two transistors must be replaced with the newer MJE15030/MJE15031 transistors. BUT the MJE transistors had a different pinout than the original SDS transistors, so they must be installed differently on the board!! this was changed on later boards to fit the standard BCE pinout
SDS trans: E B C
MJE trans: B C E
B=base
C=collector
E=emitter
the fix looks stupid, but you gotta do what you gotta do...
ALSO
If any of these coils has a bad diode, this can almost instantly kill its associated driver transistor! The coil diode prevents a coil's collapsing voltage from "backwashing" to the driver board, damaging the driver transistor.
Since you spent the time to test/replace the bad driver board transistors, (you did didn't you??) it only makes sense to also check for bad coil diodes. Since these 1N4004 diodes are mounted right to the coils under the playfield, vibration can crack or damage them.